Over a dozen cattle were also killed in the incident.
Two persons were killed and six others were injured when a HRTC building collapsed at Theog here due to heavy rains, Additional District Magistrate Sunil Sharma said.
Meanwhile a woman died when her Kachha house collapsed at Jaisinghpur in Kangra district, the officials said.
About 140 roads including 68 roads in Mandi circle alone were closed due to landslides while heavy rains lashed parts of Mandi, Kangra and Shimla districts, they said.
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There was no significant change in the minimum temperatures and Manali was coldest with a low of 13 degrees Celsius followed by Mandi 14.2 degrees Celsius, Keylong and Kalpa 15. 4 degrees Celsius while the famous tourist resorts of Shimla and Dharamshala recorded minimum temperature at 16.9 degrees Celsius and 17.2 degrees Celsius respectively.
In Bilaspur, six kuccha houses and six cowsheds were partially damaged due to heavy rainfall.
The local MeT office has warned of heavy rains in lower and mid hills on August 8 and predicted wet spell in the region for next six days up to August 10.